Fractography and Crack Initiation of Very-High-Cycle Fatigue for a High Carbon Low Alloy Steel
文献类型：期刊论文
| 作者 | Zhou CE(周承恩); Qian GA(钱桂安) ; Hong YS(洪友士)
|
| 刊名 | Key Enginering Materials
 |
| 出版日期 | 2006 |
| 卷号 | 324-325页码:1113-1116 |
| ISSN号 | 1013-9826 |
| 中文摘要 | Very-High-Cycle Fatigue (VHCF) is the phenomenon of fatigue damage and failure of metallic materials or structures subjected to 108 cycles of fatigue loading and beyond. This paper attempts to investigate the VHCF behavior and mechanism of a high strength low alloy steel (main composition: C-1% and Cr-1.5%; quenched at 1108K and tempered at 453K). The fractography of fatigue failure was observed by optical microscopy and scanning electron microscopy. The observations reveal that, for the number of cycles to fatigue failure between 106 and 4108 cycles, fatigue cracks almost initiated in the interior of specimen and originated at non-metallic inclusions. An “optical dark area” (ODA) around initiation site is observed when fatigue initiation from interior. ODA size increases with the decrease of fatigue stress, and becomes more roundness. Fracture mechanics analysis gives the stress intensity factor of ODA, which is nearly equivalent to the corresponding fatigue threshold of the test material. The results indicate that the fatigue life of specimens with crack origin at the interior of specimen is longer than that with crack origin at specimen surface. The experimental results and the fatigue mechanism were further analyzed in terms of fracture mechanics and fracture physics, suggesting that the primary propagation of fatigue crack within the fish-eye local region is the main characteristics of VHCF. |
| 学科主题 | 力学 |
| 收录类别 | EI |
| 语种 | 英语 |
| 公开日期 | 2007-06-15 ; 2007-12-05 ; 2009-06-23 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/17653]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Zhou CE,Qian GA,Hong YS. Fractography and Crack Initiation of Very-High-Cycle Fatigue for a High Carbon Low Alloy Steel[J]. Key Enginering Materials,2006,324-325:1113-1116. |
| APA | 周承恩,钱桂安,&洪友士.(2006).Fractography and Crack Initiation of Very-High-Cycle Fatigue for a High Carbon Low Alloy Steel.Key Enginering Materials,324-325,1113-1116. |
| MLA | 周承恩,et al."Fractography and Crack Initiation of Very-High-Cycle Fatigue for a High Carbon Low Alloy Steel".Key Enginering Materials 324-325(2006):1113-1116. |
入库方式： OAI收割
来源：力学研究所
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